PELAN uses pulsed 14 MeV neutrons from a small neutron generator to excite
characteristic gamma-rays from nuclear reactions. Automatic analysis of the
resulting gamma-ray spectra provides a measure of elemental compositions of
carbon, oxygen, nitrogen and hydrogen which can verify the presence of
explosives or chemical agents. Figure 6 shows SAIC’s PELAN being used to
verify the presence of explosives in a van.
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